make a pie chart of jpx stock you have separated by sector

jpx_chart_by_sector.py

import requests
import matplotlib.pyplot as plt
from dotenv import load_dotenv
import os
import japanize_matplotlib  # 日本語表示に対応させる

# get the refresh token from https://jpx-jquants.com/ and paste on a .env file

# load .emv
load_dotenv()

# 環境変数からAPIキーなどを取得
REFRESH_TOKEN = os.getenv('REFRESH_TOKEN')
API_ENDPOINT = 'https://api.jquants.com/v1'

# idToken取得
try:
    req_post = requests.post(f"{API_ENDPOINT}/token/auth_refresh?refreshtoken={REFRESH_TOKEN}")
    idToken = req_post.json()["idToken"]
except Exception as e:
    print("idTokenの取得に失敗しました。", e)
    exit()
print("API使用の準備が完了しました。")

# 銘柄コードに対応するセクター情報と株価の始値を取得する関数
def get_stock_info_and_open_price(stock_code):
    headers = {"Authorization": f"Bearer {idToken}"}
    # 銘柄情報の取得
    info_url = f"{API_ENDPOINT}/listed/info?code={stock_code}"
    info_res = requests.get(info_url, headers=headers)
    sector = info_res.json()["info"][0]["Sector33CodeName"]
    
    # 株価情報の取得
    price_url = f"{API_ENDPOINT}/prices/daily_quotes?code={stock_code}"
    price_res = requests.get(price_url, headers=headers)
    open_price = price_res.json()["daily_quotes"][-1]["Open"]
    
    return sector, open_price

# ポートフォリオ作成関数（改良版）
def create_portfolio_improved(stock_list):
    sector_investment = {}
    total_investment = 0
    
    for stock_code, shares in stock_list:
        sector, open_price = get_stock_info_and_open_price(stock_code)
        investment = open_price * shares
        if sector not in sector_investment:
            sector_investment[sector] = 0
        sector_investment[sector] += investment
        total_investment += investment
    
    sector_percentages = {sector: (amount / total_investment) * 100 for sector, amount in sector_investment.items()}
    
    plt.figure(figsize=(10, 7))
    plt.pie(sector_percentages.values(), labels=sector_percentages.keys(), autopct='%1.1f%%')
    plt.title('ポートフォリオ セクター別投資割合')
    plt.show()

# 銘柄リスト（株数に変更）  例
stock_list = [
    ('27680', 15),   # 双日
    ('67580', 10),  # マクニカ
    ('31680', 104),  # 黒谷
    ('36620', 5),    # エイチーム
    ('49790', 10),   # アグリオ   
    ('67230', 5),   # ルネサス
    ('16050', 100),    # INPEX
    ('25930', 100),    # 伊藤園
    ('46130', 300),   # 関西ペイント

]

create_portfolio_improved(stock_list)